US2541040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio range beacon
Assignee: Federal Telecommunication Laboratories Inc
•
Filing: 1946-02-05
•
Granted: 1951-02-13
•
Expires: 1966-02-05
Abstract
No abstract record available.
Inventors
- 👤 Robert I Colin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:29
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2284475A
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US2314795A
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US2368318A
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US2270401A
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US2288815A
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US2311837A
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US2392420A
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US2406970A
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US2406396A
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US2448016A
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US2406468A
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US2413637A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |